1121010100 has 36 divisors (see below), whose sum is σ = 2780106784. Its totient is φ = 384346080.

The previous prime is 1121010083. The next prime is 1121010103. The reversal of 1121010100 is 10101211.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121010103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 800022 + ... + 801421.

Almost surely, 2^1121010100 is an apocalyptic number.

1121010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121010100 is an abundant number, since it is smaller than the sum of its proper divisors (1659096684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121010100 is a wasteful number, since it uses less digits than its factorization.

1121010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601464 (or 1601457 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1121010100 is about 33481.4889155187. The cubic root of 1121010100 is about 1038.8109252704.

Adding to 1121010100 its reverse (10101211), we get a palindrome (1131111311).

The spelling of 1121010100 in words is "one billion, one hundred twenty-one million, ten thousand, one hundred".